X0306 4 2020-11-19 0 0001701541 Black Diamond Therapeutics, Inc. BDTX 0001687880 Versant Venture Capital VI, L.P. ONE SANSOME STREET SUITE 3630 SAN FRANCISCO CA 94104 0 0 1 0 0001745961 Versant Voyageurs I Parallel, L.P. ONE SANSOME STREET SUITE 3630 SAN FRANCISCO CA 94104 0 0 1 0 0001745960 Versant Voyageurs I, L.P. ONE SANSOME STREET SUITE 3630 SAN FRANCISCO CA 94104 0 0 1 0 0001765253 Versant Vantage I, L.P. ONE SANSOME STREET SUITE 3630 SAN FRANCISCO CA 94104 0 0 1 0 Common Stock 2020-11-19 4 S 0 15163 33.01 D 968954 I See Footnote Common Stock 2020-11-19 4 S 0 114854 33.01 D 4818600 D Common Stock 1432212 I See Footnote Common Stock 427063 I See Footnote The sale of these shares were effected pursuant to Rule 10b5-1 trading plans adopted by each of Versant Vantage I, L.P. ("Versant Vantage I") and Versant Venture Capital VI, L.P. ("Versant VI"), respectively. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $33.00 to $33.01, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (2) to this Form 4. Shares held by Versant Vantage I. Versant Vantage I GP, L.P. ("Versant Vantage I GP LP") is the general partner of Versant Vantage I, and Versant Vantage I GP-GP, LLC ("Versant Vantage I GP-GP") is the general partner of Versant Vantage I GP LP. Bradley J. Bolzon is a managing member of Versant Vantage I GP-GP and may be deemed to share voting and dispositive power over the shares held by Versant Vantage I; however, he disclaims beneficial ownership of such securities, except to the extent of his pecuniary interests therein. Bradley J. Bolzon is a director of the Issuer and, accordingly, files separate Section 16 reports. Shares held by Versant VI. Versant Ventures VI GP, L.P. ("Versant Ventures VI GP") is the general partner of Versant VI, and Versant Ventures VI GP-GP, LLC ("Versant Ventures VI GP-GP") is the general partner of Versant Ventures VI GP. Bradley J. Bolzon is a managing member of Versant Ventures VI GP-GP and may be deemed to share voting and dispositive power over the shares held by Versant VI; however, he disclaims beneficial ownership of such securities, except to the extent of his pecuniary interests therein. Bradley J. Bolzon is a director of the Issuer and, accordingly, files separate Section 16 reports. Shares held by Versant Voyageurs I, L.P. ("Versant Voyageurs I"). Versant Voyageurs I GP Company ("Versant Voyageurs I GP") is the general partner of Versant Voyageurs I. Bradley J. Bolzon may be deemed to share voting and dispositive power over the shares held by Versant Voyageurs I; however, he disclaims beneficial ownership of such securities, except to the extent of his pecuniary interests therein. Bradley J. Bolzon is a director of the Issuer and, accordingly, files separate Section 16 reports. Shares held by Versant Voyageurs I Parallel, L.P. ("Versant I Parallel"). Versant Voyageurs I GP, L.P. ("Versant Voyageurs I GP LP") is the general partner of Versant I Parallel. Versant Ventures VI GP is the general partner of Versant Voyageurs I GP LP. Versant Ventures VI GP-GP is the general partner of Versant Ventures VI GP. Bradley J. Bolzon is a managing member of Versant Ventures VI GP-GP and may be deemed to share voting and dispositive power over the shares held by Versant I Parallel; however, he disclaims beneficial ownership of such securities, except to the extent of his pecuniary interests therein. Bradley J. Bolzon is a director of the Issuer and, accordingly, files separate Section 16 reports. /s/ Versant Venture Capital VI, L.P. By: Versant Ventures VI GP, L.P. Its: General Partner By: Versant Ventures VI GP-GP, LLC By: Robin L. Praeger Its: Managing Director 2020-11-23 /s/ Versant Voyageurs I Parallel, L.P. By: Versant Voyageurs I GP, L.P. Its: General Partner By: Versant Ventures VI GP, L.P. Its: General Partner By: Versant Ventures VI GP-GP, LLC By: Robin L. Praeger Its: Managing Director 2020-11-23 /s/ Versant Voyageurs I, L.P. By: Versant Voyageurs I GP Company Its: General Partner By: Robin L. Praeger Its: President 2020-11-23 /s/ Versant Vantage I, LP By: Versant Vantage I GP, L.P. Its: General Partner By: Versant Vantage I GP-GP, LLC Its: General Partner By: Robin L. Praeger Its: Managing Director 2020-11-23